One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,16)(12,14)(13,15)(17,18,23,28,22,27,21,26)(19,29,30,25,31,24,20,32)(2,5)(3,7)(17,19)(18,24)(20,21)(22,31)(23,30)(25,26)(27,29)(28,32) involution — undirected(9,11,13,12)(10,14,15,16)(17,20,22,30)(18,25,27,32)(19,21,31,23)(24,26,29,28)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,26,27,28)(19,30,31,20)(24,32,29,25)(2,5)(6,8)(9,12,13,11)(10,14,15,16)(17,18,21,26,22,27,23,28)(19,29,20,32,31,24,30,25)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.